how to bind the controls on ext designer

how to bind the controls on ext designer

How to bind the controls on ext designer?

I have a json store and i already configured it to have it load the data from the source. The problem now is that i can't find any samples on how to bind controls to show the value from json store. I only manage to make the combo box work. I'd like to know how to bind or show the value from json store to text field and other controls.